CA1240227A - Baffled tobacco smoke filter and method of manufacture - Google Patents
Baffled tobacco smoke filter and method of manufactureInfo
- Publication number
- CA1240227A CA1240227A CA000494856A CA494856A CA1240227A CA 1240227 A CA1240227 A CA 1240227A CA 000494856 A CA000494856 A CA 000494856A CA 494856 A CA494856 A CA 494856A CA 1240227 A CA1240227 A CA 1240227A
- Authority
- CA
- Canada
- Prior art keywords
- filter
- rod
- smoke
- smoking articles
- fused
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/04—Tobacco smoke filters characterised by their shape or structure
- A24D3/045—Tobacco smoke filters characterised by their shape or structure with smoke acceleration means, e.g. impact-filters
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/02—Manufacture of tobacco smoke filters
- A24D3/025—Final operations, i.e. after the filter rod forming process
- A24D3/0262—Filter extremity shaping and compacting means
Landscapes
- Cigarettes, Filters, And Manufacturing Of Filters (AREA)
- Manufacturing Of Cigar And Cigarette Tobacco (AREA)
Abstract
UNITED STATES PATENT APPLICATION
of Charles H. Keith for BAFFLED TOBACCO SMOKE FILTER AND METHOD OF MANUFACTURE
ABSTRACT OF THE DISCLOSURE
A tobacco smoke filter and method of manufacturing therefor, the filter being of fusible filamentous material with at least one end thereof having a preselected fused ares extending over at least a portion of the cross-sectional area thereof to provide a flow directing baffle to direct smoke through the unfused end portion.
of Charles H. Keith for BAFFLED TOBACCO SMOKE FILTER AND METHOD OF MANUFACTURE
ABSTRACT OF THE DISCLOSURE
A tobacco smoke filter and method of manufacturing therefor, the filter being of fusible filamentous material with at least one end thereof having a preselected fused ares extending over at least a portion of the cross-sectional area thereof to provide a flow directing baffle to direct smoke through the unfused end portion.
Description
12~022~7 BACKGROUND OF THE INVENTION
_ _ Field of the Invention The present invention relates to tobacco smoke filters and, more particularly, to an improved tobacco smoke filter of a type having a S deflecting baffle therein to control tobacco flow.
Description of the Prior Art It has long been known in the smoking art to provide tobacco smoke filters at one end of smoking articles, the filters being provided with means to alter the tobacco stream flow to improve efficiency.
Recently issued patent No . 4, 457, 319, issued to Charles G . Lamb et at, on July 3, 1984, teaches such an arrangement for a filter by inserting a conically shaped element at the outlet end of the filter to diverge the smoke in a generally angularly outward direction at the mouth end of the filter.
The present invention, recognizing the importance of controlling the flow of tobacco smoke in a filter to maximize taste and efficient smoke delivery to the mouth of a smoker, provides an efficient, straightforward and economical filter arrangement and a method of ¦ making the same which requires a minimum of parts in construction and a minimum of steps in manufacture, the present invention lending itself to ready adaption to various filter ventilating arrangements.
Various other features of the present invention will become obvious to one skilled in the art upon reading the disclosure set forth herein .
SUMMARY OF THE INVENTION
More particularly, the present invention provides an improved tobacco smoke filter comprising: a porous filter of fusible fulminates material having opposed inlet and outlet ends; at least one of the ends having at least one preselected fused area extending over at least a portion of the entirety of the cross-sectional area of the end to provide a flow directing baffle to direct smoke flow through the to
_ _ Field of the Invention The present invention relates to tobacco smoke filters and, more particularly, to an improved tobacco smoke filter of a type having a S deflecting baffle therein to control tobacco flow.
Description of the Prior Art It has long been known in the smoking art to provide tobacco smoke filters at one end of smoking articles, the filters being provided with means to alter the tobacco stream flow to improve efficiency.
Recently issued patent No . 4, 457, 319, issued to Charles G . Lamb et at, on July 3, 1984, teaches such an arrangement for a filter by inserting a conically shaped element at the outlet end of the filter to diverge the smoke in a generally angularly outward direction at the mouth end of the filter.
The present invention, recognizing the importance of controlling the flow of tobacco smoke in a filter to maximize taste and efficient smoke delivery to the mouth of a smoker, provides an efficient, straightforward and economical filter arrangement and a method of ¦ making the same which requires a minimum of parts in construction and a minimum of steps in manufacture, the present invention lending itself to ready adaption to various filter ventilating arrangements.
Various other features of the present invention will become obvious to one skilled in the art upon reading the disclosure set forth herein .
SUMMARY OF THE INVENTION
More particularly, the present invention provides an improved tobacco smoke filter comprising: a porous filter of fusible fulminates material having opposed inlet and outlet ends; at least one of the ends having at least one preselected fused area extending over at least a portion of the entirety of the cross-sectional area of the end to provide a flow directing baffle to direct smoke flow through the to
-2-lZ40A~27 remaining unfused portion of the end.
In addition, the present invention provides a novel method to manufacture tobacco smoke filter units including forming a longitudinally extending porous rod from structurally stable, fusible material; cutting the rod to filter unit lengths with opposed inlet and outlet ends; and fusing at least one of the ends of each filter unit in a preselected configuration o'er at least a portion of the entirety thereof to preread a flow directing baffle to direct smoke flow through the remaining unfused portion of the end.
It is to be understood that various changes can be made by one skilled in the art in the arrangement, form, shape and construction of the inventive product disclosed and in the several steps of the inventive method disclosed without departing from the scope or spirit j of the present invention.
BRIEF DESCRIPTION OF THE DRAWING
Referring to the drawing which discloses an advantageous ¦ embodiment of the inventive product and an inventive method of making the same: j Figure 1 is a perspective view of one advantageous embodiment of the inventive tobacco smoke filter of the present invention attached to a smoking article in the form of a cigarette with the tipping material shown in unwrapped condition;
Figure 2 is a side view of the cigarette of Figure 1 showing the filter in section;
;: Figure 3 is a schematic side view of apparatus used in carrying ; out the inventive method to manufacture the smoke filter of Figures 1 2, including an endless belt and embossing wheel arrangement; and Figure 4 is a schematic top view of the apparatus of Figure 3.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to Figures 1 and 2 of the drawings, 8 filter 2 is
In addition, the present invention provides a novel method to manufacture tobacco smoke filter units including forming a longitudinally extending porous rod from structurally stable, fusible material; cutting the rod to filter unit lengths with opposed inlet and outlet ends; and fusing at least one of the ends of each filter unit in a preselected configuration o'er at least a portion of the entirety thereof to preread a flow directing baffle to direct smoke flow through the remaining unfused portion of the end.
It is to be understood that various changes can be made by one skilled in the art in the arrangement, form, shape and construction of the inventive product disclosed and in the several steps of the inventive method disclosed without departing from the scope or spirit j of the present invention.
BRIEF DESCRIPTION OF THE DRAWING
Referring to the drawing which discloses an advantageous ¦ embodiment of the inventive product and an inventive method of making the same: j Figure 1 is a perspective view of one advantageous embodiment of the inventive tobacco smoke filter of the present invention attached to a smoking article in the form of a cigarette with the tipping material shown in unwrapped condition;
Figure 2 is a side view of the cigarette of Figure 1 showing the filter in section;
;: Figure 3 is a schematic side view of apparatus used in carrying ; out the inventive method to manufacture the smoke filter of Figures 1 2, including an endless belt and embossing wheel arrangement; and Figure 4 is a schematic top view of the apparatus of Figure 3.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to Figures 1 and 2 of the drawings, 8 filter 2 is
-3-124~3227 disclosed. Filter 2 is formed from a generally cylindrical porous filter rod of heat fusible, fibrous, fulminates material with the fibers extending in a generally longitudinal direction along the axis of the filter rod, the rod being successively cut to form a plurality of such unit filters 2. Advantageously, the filter rod material can be formed from any one of a number of known cellulose acetate materiel s or of Any other fibrous or foam materials suitable for tobacco smoke so long as such material is readily heat or chemically fusible.
Filter 2 includes opposed tobacco smoke inlet end 3 and mouth end 4 and, as disclosed, longitudinally extending ventilating grooves 6 are spaced about the outer peripheral wall of filter 2. Circumscribing filter 2 to join the filter at end 3 to tobacco rod 7 to form smoking article or cigarette 11, is a suitable wrapping or tipping material 8 which it provided with a row 9 of spaced apertures communicating with ventilating grooves 6. It is to be understood that the present invention is not to be considered as limited to the parffcular ventilating grooves and tipping material assembly disclosed but that other types of porous or non-porous wraps and filter wall ¦ configurations can be used, it only being essential that the filter be of 20 I a suitable fusible material which, when selectively fused, either by ¦ heating or by appropriate non-toxic chemicfll treatment, serves to provide a substantially smoke impervious fused baffle 12.
Fused baffle 12 in the embodiment of cigarette 11 disclosed is of a geometrically conical contour similar to the embedded baffle of U. S.
patent No. 4,457,319 and is located at the central area of the mouth end or outlet end of filter 2 to make the central area substantially impervious to smoke. As in US. patent No. 4,457,319, when a smoker draws on the mouth end of filter 2 while smoking, ventilaffng air is drawn through apertures 9 in tipping material 8 into grooves 6 to travel to the mouth end 4 of filter 2. At the same time, smoke is drawn through filter a. Baffle 12 creates a flow restriction at mouth end 4 diverting the smoke generally angularly outward toward the
Filter 2 includes opposed tobacco smoke inlet end 3 and mouth end 4 and, as disclosed, longitudinally extending ventilating grooves 6 are spaced about the outer peripheral wall of filter 2. Circumscribing filter 2 to join the filter at end 3 to tobacco rod 7 to form smoking article or cigarette 11, is a suitable wrapping or tipping material 8 which it provided with a row 9 of spaced apertures communicating with ventilating grooves 6. It is to be understood that the present invention is not to be considered as limited to the parffcular ventilating grooves and tipping material assembly disclosed but that other types of porous or non-porous wraps and filter wall ¦ configurations can be used, it only being essential that the filter be of 20 I a suitable fusible material which, when selectively fused, either by ¦ heating or by appropriate non-toxic chemicfll treatment, serves to provide a substantially smoke impervious fused baffle 12.
Fused baffle 12 in the embodiment of cigarette 11 disclosed is of a geometrically conical contour similar to the embedded baffle of U. S.
patent No. 4,457,319 and is located at the central area of the mouth end or outlet end of filter 2 to make the central area substantially impervious to smoke. As in US. patent No. 4,457,319, when a smoker draws on the mouth end of filter 2 while smoking, ventilaffng air is drawn through apertures 9 in tipping material 8 into grooves 6 to travel to the mouth end 4 of filter 2. At the same time, smoke is drawn through filter a. Baffle 12 creates a flow restriction at mouth end 4 diverting the smoke generally angularly outward toward the
-4-annular Dow through space at the mouth end into the path of the ventilating air traveling along grooves 6, creating eddy currents and dispersing smoke in the smoker's mouth to increase perceived taste. It is to be understood that the geometry of the fused area, the degree of smoke imperviousness, and the configuration of ventilating structure employed can be varied in accordance with the ventilating air- smoke results desired without departing from the scope or spirit of the present invention. For example, the fused or blamed portion can extend substantially over the entirety of the cross-section of the filter with selected portions of the baffle being porous.
Referring to Figures 3 and 4 of the drawing, a novel manufacturing method of fusing tobacco smoke filters such as aforedescribed is disclosed. As is known in the art and as described above, a filter can be formed in any one of several possible manners 15 ¦ (not disclosed) from a generally cylindrical porous filter rod of heat ¦ fusible, fibrous fulminates material with the fibers extending in a ¦ generally longitudinal direction along the axis of the filter rod, the j rod then being successively cut to form a plurality of filter units, each of which in turn is assembled to a tobacco rod to form a smoking article such as cigarette 11. As affronted, the filter rod material selected can vary 60 long as such material is readily fusible.
¦ The smoking articles 11 are conveyed between two endless counter-rotating belts 13 and 14, the belts being moved at different speeds and so spaced that the lower flight of the upper belt 13 and the upper flight of belt 14 engage the peripheral sides of the cigarettes 12 to nip and move the cigarettes in a longitudinal path normal to the longitudinal axes about which the cigarettes are also caused to rotate as they are nipped by the spaced differentially speeding belts.
As the cigarettes 11 sure so moved and rotated, the fusible filter ends 2 thereof pass a fusing station 16 positioned adjacent the passing filter ends between the extremities of the spaced belts which, in turn,
Referring to Figures 3 and 4 of the drawing, a novel manufacturing method of fusing tobacco smoke filters such as aforedescribed is disclosed. As is known in the art and as described above, a filter can be formed in any one of several possible manners 15 ¦ (not disclosed) from a generally cylindrical porous filter rod of heat ¦ fusible, fibrous fulminates material with the fibers extending in a ¦ generally longitudinal direction along the axis of the filter rod, the j rod then being successively cut to form a plurality of filter units, each of which in turn is assembled to a tobacco rod to form a smoking article such as cigarette 11. As affronted, the filter rod material selected can vary 60 long as such material is readily fusible.
¦ The smoking articles 11 are conveyed between two endless counter-rotating belts 13 and 14, the belts being moved at different speeds and so spaced that the lower flight of the upper belt 13 and the upper flight of belt 14 engage the peripheral sides of the cigarettes 12 to nip and move the cigarettes in a longitudinal path normal to the longitudinal axes about which the cigarettes are also caused to rotate as they are nipped by the spaced differentially speeding belts.
As the cigarettes 11 sure so moved and rotated, the fusible filter ends 2 thereof pass a fusing station 16 positioned adjacent the passing filter ends between the extremities of the spaced belts which, in turn,
-5-if 1~4~1227 -`
can be mounted between the inversion mechanism and the catcher on a cigarette machine (not shown).
Fusing station 16, as schematically disclosed, is in the form of a heated rotating embossing wheel 17, with the teeth 18 thereof so shaped to form a conically fused and indented smoke impervious area in the filter unit 2 of each cigarette, the fused and indented area being so spaced from the peripheral wall of each unit filter 2 to provide an annular flow through passage there around.
As affronted, the geometry of the teeth 18 of wheel 17 and thus the geometry of the fused area 12 and the degree of smoke imperviousness can be varied in accordance with the results sought to ¦ be obtained.
if l I
l l I I
can be mounted between the inversion mechanism and the catcher on a cigarette machine (not shown).
Fusing station 16, as schematically disclosed, is in the form of a heated rotating embossing wheel 17, with the teeth 18 thereof so shaped to form a conically fused and indented smoke impervious area in the filter unit 2 of each cigarette, the fused and indented area being so spaced from the peripheral wall of each unit filter 2 to provide an annular flow through passage there around.
As affronted, the geometry of the teeth 18 of wheel 17 and thus the geometry of the fused area 12 and the degree of smoke imperviousness can be varied in accordance with the results sought to ¦ be obtained.
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Claims (14)
1) An improved tobacco smoke filter comprising: a porous filter of fusible filamentous material having opposed inlet and outlet ends; at least one of said ends having at least one preselected fused area extending over at least a portion of the entirety of the cross-sectional area of such end to provide a flow directing baffle to direct smoke flow through the remaining unfused portion of said end.
2) The filter of Claim 1, said filter being generally cylindrical in shape with said fused area being centrally disposed along the longitudinal axis of said rod spaced from the periphery of said rod to form an annular flow-through passage therearound.
3) The filter of Claim 1, said filamentous material being fibrous with the fibers extending in a generally longitudinal direction along the longitudinal axis of said filter.
4) The filter of Claim 1, said fused area being at said outlet end of said filter.
5) The filter of Claim 1, said fused area being in the form of a shaped indentation to divert the flow of smoke therearound.
6) The filter of Claim 5, said indentation being of generally conical shape.
7) An improved tobacco smoke filter comprising: a generally cylindrical porous filter of heat fusible, fibrous, filamentous material with fibers extending in a generally longitudinal direction along the longitudinal axis of said filter; said filter having opposed inlet and outlet ends; and, a fused conical indentation area of fiber ends centrally disposed along the longitudinal axis of said rod at said outlet end spaced from the periphery of said rod to form a substantially smoke impervious baffle with an annular flow-through passage therearound.
8) A method of manufacturing a tobacco smoke filter comprising:
forming a longitudinally extending porous rod from structurally stable, fusible material; cutting said rod to filter unit lengths having opposed inlet and outlet ends; and fusing at least one of said ends of each of said filter units in a preselected configuration over at least a portion of the entirety of the cross-sectional area thereof to provide a flow directing baffle to direct smoke flow through the remaining unfused portion of said end.
forming a longitudinally extending porous rod from structurally stable, fusible material; cutting said rod to filter unit lengths having opposed inlet and outlet ends; and fusing at least one of said ends of each of said filter units in a preselected configuration over at least a portion of the entirety of the cross-sectional area thereof to provide a flow directing baffle to direct smoke flow through the remaining unfused portion of said end.
9) The method of Claim 8, including heating said portion of one of said ends of each of said filter units to fuse said portion.
10) The method of Claim 8, including conveying said filter units in a longitudinal path normal to the longitudinal axis of said units past a fusing station adjacent the side of said path; and fusing the ends as they pass said fusing station.
11) The method of Claim 8, including heating and indenting said portion of one of said ends of each of said filter units to fuse and shape said portion.
12) The method of Claim 11, including heating and indenting simultaneously.
13) The method of Claim 12, including heating and indenting simultaneously in a conically shaped fashion along the longitudinal axis of said end to form a conically fused area spaced from the periphery providing an annular flow-through passage therearound.
14) A method of manufacturing a tobacco smoke filter comprising:
forming a generally cylindrical porous filter rod of heat fusible, fibrous, filamentous material with fibers extending in a generally longitudinal direction along the longitudinal axis of said rod; cutting said rod to filter unit lengths having opposed inlet and outlet ends;
assembling each of said filter units to a wrapped cylindrical tobacco rod to form a plurality of smoking articles; conveying said smoking articles through endless belts moving at different speeds and spaced to engage the peripheral sides of said smoking articles to move said smoking articles in a longitudinal path normal to the longitudinal axes of said smoking articles and to rotate said smoking articles about their longitudinal axes; and indenting and heating the filter ends of said smoking articles at a fusing station positioned adjacent the filter ends of said smoking articles, with the conical teeth of a heated rotating embossing wheel to form a conically fused and indented substantially smoke impervious area in each filter end spaced from the periphery of such end to provide an annular flow-through passage therearound in each smoking article filter.
forming a generally cylindrical porous filter rod of heat fusible, fibrous, filamentous material with fibers extending in a generally longitudinal direction along the longitudinal axis of said rod; cutting said rod to filter unit lengths having opposed inlet and outlet ends;
assembling each of said filter units to a wrapped cylindrical tobacco rod to form a plurality of smoking articles; conveying said smoking articles through endless belts moving at different speeds and spaced to engage the peripheral sides of said smoking articles to move said smoking articles in a longitudinal path normal to the longitudinal axes of said smoking articles and to rotate said smoking articles about their longitudinal axes; and indenting and heating the filter ends of said smoking articles at a fusing station positioned adjacent the filter ends of said smoking articles, with the conical teeth of a heated rotating embossing wheel to form a conically fused and indented substantially smoke impervious area in each filter end spaced from the periphery of such end to provide an annular flow-through passage therearound in each smoking article filter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/670,110 US4655736A (en) | 1984-11-09 | 1984-11-09 | Method of manufacturing a tobacco smoke filter |
| US670,110 | 1984-11-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1240227A true CA1240227A (en) | 1988-08-09 |
Family
ID=24689040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000494856A Expired CA1240227A (en) | 1984-11-09 | 1985-11-07 | Baffled tobacco smoke filter and method of manufacture |
Country Status (23)
| Country | Link |
|---|---|
| US (1) | US4655736A (en) |
| JP (1) | JPH0612989B2 (en) |
| AT (1) | AT392876B (en) |
| AU (1) | AU556277B2 (en) |
| BE (1) | BE903595A (en) |
| BR (1) | BR8505559A (en) |
| CA (1) | CA1240227A (en) |
| CH (1) | CH669092A5 (en) |
| DE (1) | DE3539198A1 (en) |
| DK (1) | DK160799C (en) |
| ES (1) | ES8704334A1 (en) |
| FI (1) | FI74599C (en) |
| FR (1) | FR2572901B1 (en) |
| GB (1) | GB2166641B (en) |
| GR (1) | GR852692B (en) |
| HK (1) | HK53693A (en) |
| IL (1) | IL76852A (en) |
| IT (1) | IT1186048B (en) |
| LU (1) | LU86139A1 (en) |
| MY (1) | MY101819A (en) |
| NL (1) | NL189492C (en) |
| NO (1) | NO162695C (en) |
| SE (1) | SE459551B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9122447D0 (en) * | 1991-10-23 | 1991-12-04 | Rothmans Int Tobacco | Lightweight cigarette filter and cigarettes incorporating such filters |
| US5645087A (en) * | 1995-04-05 | 1997-07-08 | Hauni Maschinenbau Ag | Method of and apparatus for decontaminating the exposed surfaces of filter mouthpieces in smokers' products |
| US7740019B2 (en) * | 2006-08-02 | 2010-06-22 | R.J. Reynolds Tobacco Company, Inc. | Equipment and associated method for insertion of material into cigarette filters |
| US7789089B2 (en) | 2006-08-04 | 2010-09-07 | R. J. Reynolds Tobacco Company | Filtered cigarette possessing tipping material |
| US8171941B2 (en) * | 2007-02-26 | 2012-05-08 | R. J. Reynolds Tobacco Company | Cigarette customization apparatus and associated method |
| US7836897B2 (en) * | 2007-10-05 | 2010-11-23 | R.J. Reynolds Tobacco Company | Cigarette having configured lighting end |
| US20100059075A1 (en) * | 2008-09-09 | 2010-03-11 | Steve Woodson | Ventilated smoking material perforation apparatus and method |
| US20100059072A1 (en) * | 2008-09-09 | 2010-03-11 | Steve Woodson | Ventilated smoking material perforation apparatus, method and product |
| US20100108084A1 (en) * | 2008-10-31 | 2010-05-06 | Norman Alan B | Filtered cigarette with diffuse tipping material |
| US20100108081A1 (en) * | 2008-10-31 | 2010-05-06 | Leigh Ann Blevins Joyce | Filtered cigarette with flavored tipping material |
| US8522515B2 (en) * | 2009-01-26 | 2013-09-03 | R.J. Reynolds Tobacco Company | Method and apparatus for customizing cigarette packages |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3040752A (en) * | 1959-06-15 | 1962-06-26 | Ganz Henry | Filter cigarettes |
| US3490461A (en) * | 1967-04-20 | 1970-01-20 | Philip Morris Inc | Cigarette ventilation |
| AR204115A1 (en) * | 1974-01-18 | 1975-11-20 | Reynolds Tobacco Co R | APPARATUS FOR FORMING AXILE IMPRESSIONS IN CIGARETTE FILTERS |
| GB1462726A (en) * | 1974-09-19 | 1977-01-26 | Cigarette Components Ltd | Smoke filter process and apparatus |
| FI60109C (en) * | 1976-03-17 | 1981-12-10 | British American Tobacco Co | FOERFARANDE FOER FORMNING AV ETT FOER EN CIGARRETT ELLER DYLIK TOBAKSPROUKUKT AVSETT FILTERS STAONGDEL |
| GB1592549A (en) * | 1976-10-06 | 1981-07-08 | British American Tobacco Co | Tobacco-smoke filters |
| US4256122A (en) * | 1979-04-11 | 1981-03-17 | Brown & Williamson Tobacco Corporation | Cigarette filter |
| US4331166A (en) * | 1980-05-02 | 1982-05-25 | Philip Morris, Incorporated | Cigarette |
| US4324540A (en) * | 1980-07-11 | 1982-04-13 | Brown & Williamson Tobacco Corporation | Apparatus for making grooves in tobacco smoke filters |
| US4457319A (en) * | 1982-06-22 | 1984-07-03 | Brown & Williamson Tobacco Corporation | Cigarette filter |
-
1984
- 1984-11-09 US US06/670,110 patent/US4655736A/en not_active Expired - Lifetime
-
1985
- 1985-10-17 CH CH4480/85A patent/CH669092A5/en not_active IP Right Cessation
- 1985-10-24 LU LU86139A patent/LU86139A1/en unknown
- 1985-10-25 FR FR858515874A patent/FR2572901B1/en not_active Expired - Lifetime
- 1985-10-28 IL IL76852A patent/IL76852A/en not_active IP Right Cessation
- 1985-11-04 NL NLAANVRAGE8503014,A patent/NL189492C/en not_active IP Right Cessation
- 1985-11-05 DE DE19853539198 patent/DE3539198A1/en active Granted
- 1985-11-05 SE SE8505208A patent/SE459551B/en not_active IP Right Cessation
- 1985-11-06 AT AT3203/85A patent/AT392876B/en active
- 1985-11-06 AU AU49395/85A patent/AU556277B2/en not_active Ceased
- 1985-11-06 BR BR8505559A patent/BR8505559A/en not_active IP Right Cessation
- 1985-11-06 BE BE0/215830A patent/BE903595A/en not_active IP Right Cessation
- 1985-11-07 GB GB08527461A patent/GB2166641B/en not_active Expired
- 1985-11-07 FI FI854388A patent/FI74599C/en not_active IP Right Cessation
- 1985-11-07 GR GR852692A patent/GR852692B/el unknown
- 1985-11-07 NO NO854439A patent/NO162695C/en not_active IP Right Cessation
- 1985-11-07 CA CA000494856A patent/CA1240227A/en not_active Expired
- 1985-11-08 ES ES548700A patent/ES8704334A1/en not_active Expired
- 1985-11-08 DK DK515685A patent/DK160799C/en not_active IP Right Cessation
- 1985-11-09 JP JP60251824A patent/JPH0612989B2/en not_active Expired - Lifetime
- 1985-11-11 IT IT22782/85A patent/IT1186048B/en active
-
1987
- 1987-11-20 MY MYPI87001398A patent/MY101819A/en unknown
-
1993
- 1993-06-03 HK HK536/93A patent/HK53693A/en not_active IP Right Cessation
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